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​Encephalocele

An encephalocele is a rare birth defect in which the tissue covering the brain, and a portion of the brain itself, protrude through openings in the skull.

Learn about the treatment options for Encephalocele at the UPMC Pituitary Center of Excellence.

Contact the UPMC Department of Neurosurgery

To make an appointment or learn more:

  • Call us at 1-412-647-3685 or outside the U.S., call 1-877-320-8762.
  • Fill out our UPMC Neurosurgery contact form.
  • Overview
  • Symptoms & Diagnosis
  • Treatment

What is Encephalocele?

An encephalocele is defined as a very rare birth defect in which nervous tissue protrudes through openings in the skull. This forms a skin-covered sac outside the skull.

Less frequently, only a thin membrane covers the sac, increasing its vulnerability.

The contents of the sac can vary, and may include:

  • Meninges (the membranes that surround the central nervous system)
  • Blood vessels
  • Neural tissue from the underlying area of the brain

Doctors typically can diagnose encephaloceles during a prenatal ultrasound or at birth.

The prognosis for this condition depends on the location of the sac and its contents. The outlook is most favorable when the sac does not contain any functional neural tissue.

The treatment for an encephalocele is surgery. At UPMC, the preferred surgical treatment for encephaloceles of the skull base is the Endoscopic Endonasal Approach (EEA). This innovative, minimally invasive technique uses the nose and nasal cavities as natural corridors to access hard-to-reach or previously inoperable tumors. Benefits of EEA include:

  • No incisions to heal
  • No disfigurement
  • Faster recovery time

EEA has proven safe and effective in children and adults. More than 100 children have been treated by UPMC skull base surgeons using EEA — more than at any other neurosurgery center in the world.

Diagnosing an Encephalocele

Ultrasound images of the fetus can reveal the presence of a herniated, fluid-filled sac outside the skull.

Encephaloceles that go undetected during gestation usually are diagnosed at birth by observation of the deformity.

Disorders associated with an encephalocele

Other developmental disorders usually accompany encephalocele. Once diagnosed, doctors will search for these other conditions or abnormalities, such as:

  • Hydrocephalus (excessive accumulation of cerebrospinal fluid in the ventricles of the brain)
  • Microcephaly (abnormally small head)
  • Paralysis

In rare cases, a small encephalocele in the nasal cavity can remain undetected for years, even into adulthood.

An MRI is the preferred test to identify the contents of the sac. This is essential for determining the best treatment for an encephalocele.

Encephalocele Treatment

Surgery to remove the herniated sac and repair the opening in the skull is the only encephalocele treatment.

If the encephalocele is covered by normal skin rather than a thin membrane, surgery may be postponed until the child is older.

In most cases, any neural tissue contained in the sac is abnormal and surgeons will remove it. However, if healthy neural tissue is present in the sac, one of the goals of surgery is to preserve it.

The surgical approach depends on the location and contents of the encephalocele. If the sac does not contain vital nervous tissue, surgeons simply remove the encephalocele and repair the opening in the skull.

Minimally invasive surgery

Encephaloceles of the skull base may be approached directly using the Endoscopic Endonasal Approach (EEA). This state-of-the-art, minimally invasive approach allows surgeons to access the tumor through the natural corridor of the nose, without making an open incision. Surgeons then remove the encephalocele through the nose and nasal cavities.

EEA offers the benefits of no incisions to heal, no disfigurement, and a faster recovery time.

Minimally Invasive Brain Surgery
Minimally Invasive Brain Surgery Offers Hope
Endoscopic Endonasal Approach (EEA)
Pituitary Tumor Removal Using the Endoscopic Endonasal Approach (EEA) at UPMC
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